Improvement in steam-generators



tttentl Gettin.

THOMAS SHAW, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 94,781, dated September 14, 1869.

IMPROVEMENT 1N STEAM-GENERATORS.

The Schedule referred to these Lettera Patent and making part of the same.

To all whom it 'may concern:

Beit known that I, T HoMAs SHAW, of the city and county of Philadelphia, Pennsylvania, have invented a new and improved Steam-Boiler; and I do hereby declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

My invention consists in the casting of a cluster of tubes .in one piece, in the manner and for the purpose as hereafter described.

The object of the invention is to furnish a safe and reliable boiler, of cheap construction, useful as a 1narine or stationary boiler.

In order to enable others to use and practise my invention, I will proceed to describe its construction and operation.

Ou Areference to the accompanying drawing, which forms part of this specification- I Figure l represents a side view of a cluster of tubes iu one piece, of which a represents the vertical tubes united at their bottom ends by inlet and blow-off tube d, an'd at their top ends by tube j, which has a central outlet at e.

The clusterof tubesis of east-iron, and the caps b are for closing the apertures formed by the cores.

'The intervening space between tubes ais east v closed by metal of the same thickness as the tubes. 4

A rib, c", is projected from the casting ou the top and fri-,ont cud of the cluster, for the purpose-of meeting a like rib on a similar cluster, iu order to regulate the distance between the same, and for the purpose of dispensing with a brick wall to close said space.

Four clusters of said tubes are joined together, as represented in Figure 2, and steam connection is made with the saine hy pipe g, and water connection is made by pipe c.

' rlheinner clusters of tubes need not have the int-erveiling space bct\veeutubes a east shut, as that is only useful on the outside, to render a brick wall unnecessary. The ordinzuy {biting-materials caube sub stituted instead.

. Ordinary bolts can be run through apertures k, to hold the several clusters in close contact, and the whole mass is rested upon an ordinary grate and fireplace, provided with the ordinary bars, and the back end h communicates with the smoke-stack or ordinary chimney.

This construction of boiler is of the cheapest character, affords great opportunity for blowing out foreign substances, and will permit a low water-line, and is independent of heavy brick walls. L

What l claim, and desire to. secure by Letters Patent, is

lhe construction and arrangement of the described boiler, in the manner and for the purpose substantially as set forth.

THOMAS SHAW.

Witnesses:

E. COBB,` PHILIP S. J UsTIeE.\ 

